CN2256090Y - Bottom electrodes of D.C. electric furnace - Google Patents
Bottom electrodes of D.C. electric furnace Download PDFInfo
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- CN2256090Y CN2256090Y CN 96209156 CN96209156U CN2256090Y CN 2256090 Y CN2256090 Y CN 2256090Y CN 96209156 CN96209156 CN 96209156 CN 96209156 U CN96209156 U CN 96209156U CN 2256090 Y CN2256090 Y CN 2256090Y
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- metal
- electrode
- base plate
- furnace
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Abstract
The utility model relates to a furnace bottom electrode for direct current ore heating electric furnaces, which comprises a metal introducing electrode, a metal base plate and metal plates which are vertically arranged. The utility model is characterized in that two metal rods or a rod body which is provided with metal rods on both ends and a carbon brick at middle part is used as the introducing electrode of the furnace bottom electrode and is fixed on the diameter of the circular metal base plate, the metal base plate is composed of four metal plates and are respectively welded together with the introducing electrode metal rods, the upper edge of the metal base plate on the vertical direction of the introducing electrode is welded with a plurality of the metal plates which are vertically arranged, and the carbon bricks are bonded between the vertical metal plates. The utility model has the advantages of simple structure, high safety and long service life and can overcome the defect of easy oxidation of the primary graphite bottom electrode.
Description
The utility model belongs to smelting equipment, is applicable to ferroalloy smelting.
Because the development of power rectifier technology and the superiority of direct current furnace self, make direct current electric arc furnace in nearly ten years, obtain development rapidly, the trend that replaces ac electric arc furnace is arranged greatly, the degree of the development of direct current electric arc furnace technology or replacement ac arc furnace, its key problem in technology depends primarily on hearth electrode.
Up to the present, external different according to material and the type of cooling, hearth electrode can reduce three kinds, i.e. bar type water-cooled, the air-cooled and air-cooled electrode of conduction refractory of contact pin type, three kinds of form bottom electrode structurals all are not subjected to the restriction of furnace volume size.Domestic direct current furnace hearth electrode mainly contains two kinds of forms, i.e. bar type water-cooled and contact pin type air cooled bottom electrode.Above-mentioned domestic and international direct current furnace bottom electrode structural form all has certain limitation to DC-ore-heating furnace, they mainly are to be used for steel-making, function, equipment and the technological operation of the hot stove in ferroalloy ore deposit are different from steel-making fully, the hot stove furnace bottom in ore deposit all is to build by laying bricks or stones at the bottom of the stationary furnace of carbon brick, and steel-smelting electric furnace is with at the bottom of magnesia or the tilting furnace that the magnesium carbonaceous is built by laying bricks or stones.We have designed the hot stove in single electrode small-sized DC ore deposit in 1989 in view of the above, and the conduction furnace bottom adopts graphite to introduce hearth electrode, and the bottom construction of this DC-ore-heating furnace adopts the graphite fragment of brick to introduce electrode electric power is incorporated into furnace bottom from the furnace shell both sides, and furnace shell is fixed.This bottom electrode structural is simple, and is safe and reliable, and the life-span is long, and heat loss is few, but shortcoming is because graphite hearth electrode resistance is big and be easy to oxidation, in general, relatively is suitable for the ore-smelting electric furnace of small electrical electrode structure.Because small-sized ore-smelting electric furnace electric current is little, use the radical of graphite electrode few, be easy to graphite introducing electrode and furnace bottom are carried out seal protection, than the oxidation that is easier to control hearth electrode.And big-and-middle-sized ore-smelting electric furnace uses the radical of graphite electrode more comparatively speaking because electric current is bigger, be difficult to accomplish hearth electrode and furnace bottom are carried out effective protection against oxidation, and bottom electrode structural is arranged not compact.
It is a kind of simple in structure, safe and reliable that the purpose of this utility model is to provide, and the life-span is long, and electric current can be evenly distributed on the whole conduction furnace bottom, and can overcome the DC-ore-heating electric furnace hearth electrode of the easy oxidation shortcoming of graphite hearth electrode in the past.
Based on above-mentioned purpose, the utility model adopts the composition metal bottom electrode structural, to be characterized in two metal bars or both ends be the barred body that embeds carbon brick in the middle of the metal bar is fixed on the shape metal base plate diameter of garden as the introducing electrode of hearth electrode, described metal base plate is made up of four metallic plates, and weld together with introducing electrode metal rod respectively, introduce the vertical direction welding some of electrode in the metal base plate upper edge and erect the placed metal plate, place vertically and build carbon brick between the metallic plate by laying bricks or stones, outside furnace shell, introduce electrode for two and cool off, and insulate with furnace shell along one section direct water flowing of furnace shell direction.
The size of hearth electrode is determined, comprises metal introducing electrode, and metallic plate and setting metallic plate three parts are followed following principle in design.
1, at first according to the requirement of the size and the current density of electric current, determines hearth electrode each several part size.
2,, determine to erect the quantity and the size of metallic plate according to the requirement of brick-building art.
3, metal introduces that electrode water-cooled segment length is short, intensity of cooling is according to the specification requirement of furnace bottom stable operation, according to calculate and experience definite.
With conventional art comparison the utility model hearth electrode following advantage is arranged.
1, electric current can be evenly distributed on the whole conduction furnace bottom.
2, because metallic resistance rate nearly 10 times than the resistivity young pathbreaker of graphite electrode, therefore the conductive effect of metal introducing electrode is more much better than than graphite electrode, to the use electric current of DC-ore-heating furnace 70KA, only need two introducing electrode, and use graphite electrode just to need 10.This is simplified DC-ore-heating electrode structure of furnace hearth layout greatly.
3, solved graphite hearth electrode problem of oxidation fully, hearth electrode can be worked under safe and reliable condition.
4, fixed conduction hearth electrode adopts the introducing electrode from the furnace shell both sides direct current power to be incorporated into furnace bottom.
5, the life-span long, its life-span is identical with the ac electric arc furnace life of bottom, hearth electrode does not need to change.
6, this DC-ore-heating electric furnace bottom construction not only is suitable for the DC-ore-heating furnace of single electrode, and is suitable for the DC-ore-heating furnace of three electrodes.
7, this DC-ore-heating electric furnace bottom construction not only can be used for having the ferroalloy product of slag melting, and can be used for not having the ferroalloy product of slag melting.
Below in conjunction with accompanying drawing the utility model is further described.
Fig. 1 is a planar structure schematic diagram of the present utility model.
Among the figure, 1 is metal introducing electrode, and 2 is metal base plate, and 3 for erectting the placed metal plate, and 4 is carbon brick.
The utility model anything did not occur working well in the production practices continuously So, fully demonstrate the DC-ore-heating Decreasing High Eectricity Consumption in Electric Furance Steelmaking and save the excellent of consumption of electrode Get over property.
Claims (1)
1, DC-ore-heating electric furnace hearth electrode, comprise that metal introduces electrode, metal base plate, setting placed metal plate, it is characterized in that: being the barred body that embeds carbon brick in the middle of the metal bar with two metal bars or both ends is fixed on the diameter of garden shape metal base plate as the introducing electrode of hearth electrode; Described metal base plate is made up of four metallic plates, and welds together with introducing electrode metal rod respectively; Introduce the vertical direction welding some of electrode in the metal base plate upper edge and erect the placed metal plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96209156 CN2256090Y (en) | 1996-04-29 | 1996-04-29 | Bottom electrodes of D.C. electric furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96209156 CN2256090Y (en) | 1996-04-29 | 1996-04-29 | Bottom electrodes of D.C. electric furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2256090Y true CN2256090Y (en) | 1997-06-11 |
Family
ID=33892882
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 96209156 Expired - Fee Related CN2256090Y (en) | 1996-04-29 | 1996-04-29 | Bottom electrodes of D.C. electric furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2256090Y (en) |
-
1996
- 1996-04-29 CN CN 96209156 patent/CN2256090Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |